32 Ill. Adm. Code 351.1070
Utilization Records
Section 351
Section 351.1070 Utilization
Records
Each licensee or registrant
shall maintain current records, which shall be kept available for inspection by
the Agency for 2 years from the date of the recorded event, showing the
following information for each source of radiation:
a) Make, model number and a serial number or a description of
each source of radiation used;
b) The identity of the well-logging supervisor or field unit to
whom assigned;
c) Locations where used and dates of use; and
d) In the case of tracer materials and radioactive markers, the
utilization record shall indicate the radionuclide and activity used in a
particular well.